Lock



Dec. 19, 1922. 1,439,021. j V-S. W. PELSUE ET AL.

LOCK.

FILED OCT. 18. 192|. 2 SHEETS-SHEET l.

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Dec. 19, 1922 S. W. PELSUE ET AL.

LOCK.

FILED oCT.1.1921. y

2 SHEETS-SHEET 2.

Patented Dec. i9, 1922i SENECA VJ. PELSUE AND ERNEST W. CUDXVORTH, OF ARLNGTON, VERMONT.

sra r LOCK.

Application filed October 18, 1921. Serial No. 508,452.

description thereofis deemed unnecessary.

`FiXedly mounted in or cast integral with the half 2fL of the differential and rear axle housing is a preferably rectangularI open ended boxing 8, within which is slidably mounted a rectangular locking plunger or `member 9, having a segmental shaped offset end 10, formed with teeth. ll., adapted to mesh with the teeth 7 of ring gear 5 when the plunger Slis moved inwardly against the tension of springs 20 about to be described.

rlhe outward movement of the plunger 9 to disengage it from the ring gear is effected by means of a pair of oppositely disposed coil springs 20 connected at their outer ends to pins 2l secured to the open ended boxing 8 and at their inner ends to pins 22 connected to the plunger 9, the pins 22 extending through slots 23 formed in the boxing 8 for the purpose of permitting limited reciprocatory movement of the boxing.

When the plunger 9 is in its innermost or locking position a pair of locking pins 24 arranged to slide in recesses 25 formed in the plunger), on opposite sides of the bore l1 thereof, will have their reduced ends forced into the openings 26 in the boxing 8 by means of coil springs 27 thus effectively locking the plunger against withdrawal from locking engagement with the ring gear. To unlock the plunger it is necessary to withdraw the spring pressed pins 24 from the recesses 26 in the boxing 8. This is accomplished as follows:

A, loclr cylinder 12 :is fixed in the outer end of the bore lll of the plunger and u'laptN ed 'to move therewith, Secured within the lock cylinder l2 is a sleeve 28, both the sleeve and cylinder being formed with registering recesses adapted. to accommodate the ordinary spring pressed tumblers 29. rlhese tumblers normally extend into a narrow key receiving slot 30 formed in the outer end of a connecting bar 3l rotatably To all, who-m t may concern.'

Be it knownthat @nunca lV. Prinsen and ERNEST W. Cunwonrrr, citizens of the United States of America, residing at Arlington7 in the county of Bennington and State of Vermont, have invented certain new and useful lmproven'ients :in Locks, of which the following is a specification.

Our invention relates to new and useful improvements in means for preventing theft or unauthorized use of motor vehicles. A

The object of our invention is to 'provide an effective means for locking the ring` gear of the differential mechanism against rota-- tion and consequently prevent rotation of the rear or driving wheels.

Other and further objects of our invention will be in part obvious and in part described as the specification is proceeded with.

ln the accompanying drawings forming part of this specification wherein we have illustrated a preferred embodiment of our invention Figure l is a transverse section through the differential casing and lock;

Figure 2 is an end elevation of the lock showing one half of the easing removed;

Figure 3 is a side elevation of the lock in engagement with the ring gear;

Figure 4 is a transverse section on the line 4-4 of Figure 5;

Figure 5 is a section on line 5-5 of Figure 4v;

Figure 6 is a. section on the line G-G of Figure Ll; and

Figure 7 is longitudinal sei'ztional View through the :ylinder lock.

Referring more particularly to the drawings, l and 1a denote the rear axles of an automobile and 2 and 2a the usual two part differential and rear axle housing. Enclosed within the housing 2 is the differential casing 3 provided with a flange 4l to which is suitably secured the ring gear 5 as by means of bolts 6. It will be understood that the ring gear 5 rotates with the differential casing 3 and is driven by the usual drive shaft (not shown) meshing with the teeth 7 of the ring gear. It will also be understood that the differential casing 3 houses the compensating gears (not shown) and the gears (also not shown) on the inner ends of rear axles l and l,

As the parts above brieliy referred to are all old and well known further and detailed inner end of the bar 3l being of rectangular shape to snugly seat in the rectangular opening 32 of a cylindrical latch member 33 formed with longitudinally oppositely disposed ribs 34. These ribs are adapted to engage shoulders 35 on the pins 24 and withdraw the pins from the recesses or openings 26 in the boxing 8, when the latch member 33 is turned in a clockwise direction. lt is obvious from an inspection of Figure 7 that when the key 36 is :inserted in the and slidably mounted in the sleeve 28, the' 4 a ring gear, a housing 'for the diiferentiall;

slot 30, the spring pressed tumblers 29 will be forced out of the slot 30, thus permitting the latch member 33 to be turned to release the plunger 9. When this occurs the springs 2O will withdraw the teeth 11 of the plunger from engagement with teeth of the ring wear. :D From the foregoing it is obvious that the differential can be locked by the operator merely pushing inwardly on the plunger 9 or the cylinder lock secured thereto, and that the only operation necessary to unlock the device is the insertion of the proper key in the slot 30 and sufficient turning of the key in a clockwise direction to release the pins 24:.

Having thus described our invention what we claim as our invention is:

In locking mechanism for motor Vehicles having a differential mechanism including mechanism, a boxing fixed to said housing, a toothed plunger slidably but-nonrotatably mounted in said boxing, said boxing having recesses therein, spring pressed pins carried by said plunger adapted to enter said recesses to lock said plunger in engagement with said ring gear when said plunger is pushed forwardly in said boxing, a rotatable latch member in said plunger, a cylinder lock in said plunger, a bar connected at one end to and rotatable with said latch member, and means for rotating said bar to release spring pressed pins.

In testimony whereofl we affix our signatures in presence of two witnesses.

SENECA WV. PELSUE. ERNEST lV. CUDlVORTI-l.

Witnesses:

GEORGE D. HOWARD, EDWARD E. PrULLirs. 

